Torsional vibration damper

Abstract

A torsional vibration damper for damping a vibration component of a rotational movement around an axial direction has a damper mass to carry out an oscillation to damp the vibration component, a damper mass carrier to movably guide the damper mass, and a supporting body in contact with or can enter into contact with the damper mass in at least one operating situation of the torsional vibration damper. The supporting body is connected to the damper mass carrier to drive the supporting body relative to the damper mass carrier during rotation of the torsional vibration damper, and a support structure formed together with the supporting body to radially support the supporting body under a first operating condition and to radially release the supporting body under a second operating condition which differs from the first operating condition.

The invention claimed is: 
     
       1. A torsional vibration damper configured to damp a vibration component of a rotational movement around an axial direction, comprising:
 a damper mass configured to carry out an oscillation depending on the rotational movement to damp the vibration component of the rotational movement; 
 a damper mass carrier configured to movably guide the damper mass; 
 a supporting body connected to the damper mass carrier to drive the supporting body relative to the damper mass carrier during rotation of the torsional vibration damper and configured to be one of in contact with or to enter into contact with the damper mass in at least one operating state of the torsional vibration damper; 
 a support structure configured to radially support the supporting body under a first operating condition, wherein the first operating condition includes dropping below a predetermined first temperature, and a radial gap between the support structure and the supporting body under a second operating condition that differs from the first operating condition; 
 a rotational vibration damper having a plurality of energy storage elements arranged along a circumferential direction, via which energy storage elements the rotational movement is transmitted in order to damp one of the vibration component and a further vibration component of the rotational movement, 
 wherein the plurality of energy storage elements are arranged in a channel that is at least partially covered by a cover component part, 
 wherein the cover component part comprises the support structure, 
 wherein the cover component part is a cover plate, and 
 wherein the support structure is formed by a reshaped portion of the cover plate. 
 
     
     
       2. The torsional vibration damper according to  claim 1 , wherein the second operating condition includes exceeding a predetermined second temperature. 
     
     
       3. The torsional vibration damper according to  claim 2 , wherein the second temperature is greater than or equal to the first temperature. 
     
     
       4. The torsional vibration damper according to  claim 1 , wherein the supporting body is made of a material that has a higher thermal expansion coefficient than a material from which the support structure is made. 
     
     
       5. The torsional vibration damper according to  claim 1 , wherein the support structure is made from a metal or a metal alloy. 
     
     
       6. The torsional vibration damper according to  claim 1 , wherein an output component part of the torsional vibration damper comprises the support structure. 
     
     
       7. The torsional vibration damper according to  claim 1 , wherein the supporting body is connected to the damper mass carrier to be radially guided by the damper mass carrier during the first and second operating conditions. 
     
     
       8. The torsional vibration damper according to  claim 7 , wherein the damper mass carrier is configured to guide the supporting body radially in a same direction as the support structure supports the supporting body. 
     
     
       9. The torsional vibration damper according to  claim 1 , wherein the support structure has a support surface configured to one of contact or enter into contact with a complementary support surface of the supporting body to support the supporting body. 
     
     
       10. The torsional vibration damper according to  claim 9 , wherein the support surface and the complementary support surface have in each instance at least partially a contour in a cross-sectional plane along the axial direction and radial direction such that one contour is adapted to the other. 
     
     
       11. The torsional vibration damper according to  claim 1 ,
 wherein the damper mass comprises a first partial damper mass and a second partial damper mass, 
 wherein the first partial damper mass is arranged along the axial direction at a first side of the damper mass carrier, and the second partial damper mass is arranged at a second side remote of the first side along the axial direction, 
 wherein the first and second partial damper masses are mechanically connected to one another, and 
 wherein the torsional vibration damper is configured such that only the first partial damper mass can enter into contact with or be in contact with the supporting body during the at least one operating situation. 
 
     
     
       12. The torsional vibration damper according to  claim 1 , wherein the rotational vibration damper is arranged radially inside the damper mass.